It won’t turn on; the only sign I get is a small noise from the power supply. So I think the problem is probably the power supply, because I’ve already opened up the whole console, cleaned out the dust, and still nothing. I wanted to be able to replace the thermal paste to see if that’s it, but I don’t know how to do it. Does anyone know where I can buy another power supply, or if there’s someone who fixes Xbox 360s for a good price here in Curitiba? Or what other kinds of tests I can do?